The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Looking for info on direct swap steering box innfo for my 70

68Stepbed · 02-05-2018, 10:14 AM

73-78 truck boxes have the same 3/4" spline shaft, and Inverted Flare fittings. 79-81(or 82) have the larger 7/8" spline, but still have the IF fittings. 83-87 have the metric O-ring fittings and the 7/8" spline shaft. Some of these number may or may not be accurate, but enough to give you an idea on what to look for.

All the 73-87 boxes are variable ratio. The 69-72 boxes are direct ratio.

02-05-2018, 10:14 AM	#3
68Stepbed Registered User Join Date: Mar 2005 Location: 10-Uh-See Posts: 5,609	Re: Looking for info on direct swap steering box innfo for my 70 73-78 truck boxes have the same 3/4" spline shaft, and Inverted Flare fittings. 79-81(or 82) have the larger 7/8" spline, but still have the IF fittings. 83-87 have the metric O-ring fittings and the 7/8" spline shaft. Some of these number may or may not be accurate, but enough to give you an idea on what to look for. All the 73-87 boxes are variable ratio. The 69-72 boxes are direct ratio. __________________ Matt 68 C10 stepside, LS1/700R4, TCI Engineering suspension system